Punch press



Aug. 16, 1927.

J. J. NEILAN PUNCH PRESS INVENTOR Filed A'Dril the auto body.

Patented Aug. 16, 1927.

"UNITED STATES:

JOHN J. NEILAN, or CLEVELAND, oHIo.

PUNCH PRESS;

Application filed April 21, 1926. Serial no. 103,568.

This invention relates to new and useful improvements in punch pressesand more particularly to power driven nail-hole perforating or punchpresses adapted to be adjusted for a vertical gravity feed or ahorizontal hand feed of angularly formed sheet metal automobile bodytrim having spaced nailing tabs for rapid separate nailhole punchingthereof, for nailing the trim to The present practice is to nailholepunch the nailing tabs separately by passing the trim rapidly by handthrough a power driven punch press. In this manner some of the tabs areusually missed and'leftunperforated by the punch and are consequentlynotnailed when the trim is applied to an auto body. Another practice is tocombine the puncher with the trim stamping and v forming dies, formingand punching the sheet metal trim simultaneously. In this practice thestresses and strains set up in the sheet metal while forming causes thepunches to break often, delaying operation and production.

In my improved means for separately nailhole punching the trim tabs, anobject is to,

provide adjustable guiding means co-operatmg w1th transverse gaugingmeans for feeding the trim vertically by gravity, while gauging the tabstransversely for punchin Another object is to provide adjustable meansfor longitudinally gauging the tabs, co-operating with the transversegauging and guiding means for centering the tabs for nailhole punching.

A further object is to provide adjustable means for horizontally feedingthe trim by hand for nailhole punching, including adjustable transversegauging means co-operating with adjustable longitudinal gauging meansfor centering the tabs for nailhole punching. Other objects and featuresof the invention will be hereinafter pointed out and described.

In the drawings Fig. 1 is a plan view of the punch press positioned forvertical gravity feeding of the auto body trim.

Fig. 2 is a detail plan view of the punch head and die block with partsbroken away.

Fig. 3 is a detail section on line 33 of Fig. 1.

Fig. 4 is an enlarged front view of the punch head and die block.

Fig. 5 is an enlarged detail view with parts removed showing verticalthe auto body trim.

Fig. 6 is a perspective of a punched by the press. Referring! secifically to the-drawings,- 5 indicates the frame of a punch presshaving a base 6, a pulley driven crankshaft? connected by connecting rod8 to block 9 slidably mounted on guideways 10 on the frame. The block 9has a socket 11 with set screw 12 for securing the post 13 of a punchhead 14 carrying the punch 15 and an adjustable post 16 set screwed asat 17 to the head and carrygravity feeding of piece of Work ing at theend thereof a cam '18. A substantially-shaped die block 19 is secured bybolt 20'to the base 6 of the press. 1 I

The outer face of block 19 is recessed at 21 and 22a stripper 23'secured by screws 24 in recess 22 provides a slot at recess 21 throughwhich the material or trim, as hereinafter described, is fed forpunching. A punch guide 25 is mounted in stripper 23' aligning the punchwith a die 28 mounted in a bore 27 in the blocln Gauging strips 28 of;graduated thickness aregadapted to be suitably secured to the outer faceof block 19 for guiding. and transversely gauging the materizil forpunching.

Means for longitudinally gauging the sheet metal trim is provided by arocking gauge or stop 29 pivoted at 30 on a pin '31 between the arms ofthe block 19 having slot 33 therein slidably receiving the gauge toe 32.An arm 34 formed at right angles to the gauge at the pivot 30 has a knob35 at the end thereof.

The material or trim to'be punched may be automobile body sheet metaltrim indicated generally at 36 which is tamped and formed in varioussuit-able shapes usually having an outer face 37 which may be plain orbeaded and a substantially right angled flange 38 formed with spacedprojecting nailing tabs 39 which are separately punched as at 40 toreceive the nails securing the trim to the auto body.

For vertical gravity feed punching the press is positioned on its backas shown in Fig. 1 and suitable guides 41 adjustably se cured to block19 by screws 42 are positioned to co-operate with gauge 28 for guidingand feeding the trim 36 which drops between by gravity as shown in Fig.5, the gauge 28 transversely centering the tabs for the perforatingstroke of the punch. The tabs are gauged longitudinally for theperforating and 5, the crankshaft 7 through connecting rod 8 and block 9thrusts the punch head 1d toward die block 19, forcing the punch endthrough a centered tab 39 into die opening 26. At this point of travelthe post end 16 engages the gauge arm 29 swinging the toe 32 out of slot21 and throwing knob 35 forward as shown in Fig. 2. Upon completion ofthe punch stroke the punch head let is drawn back by the crank, drawingthe punch 15 out of the tab against stripper 23 allowing the tab 89 todrop.

Further withdrawal of the punch head engages cam 18 in post 16 with knob35, forcing the knob back, throwing gauge toe 32 across slot 21 againcatching and centering the next tab 39 above, which drops thereupon. Thepunch is now ready to re peat the cycle of operation. The gauge toe 32is timed to catch and center each tab as the trim drops.

For horizontal feeding of the trim for punching, the press is adjustedupright on its base 6 and the trim 39 is fed rapidly against gauge 28from the right to the left hand side the tabs passing through the slot21. The guides 41 are omitted. The gauge 32 is timed to stop and centereach tab for perforation by the punch 15 as hereinbefore.

described.

lVhile I have shown and described certain embodiments of the invention,obviously various changes in the details of construction may be madewitnout departing from the spirit and scope of the appendedv claims.

I. claim 1. The combination in a punching machine for notched work, saidmachine having a reciprocating punch, a die, and a guide for the work,said guide having aslot extending cross-wise thereof, of a pivoted stopworking in saidv slot and movable sidewise with respect to the guide toengage in a notch in the work, and means actuated by the movement of thepunch to operate the stop.

2. The combination stated in claim 1, said means including a cam carriedby the punch and a projection on the stop engaged by said cam. a r

3. The combination in a punching machine having a punch and a die, of awork guide having a slot therein at'substantially right angles to thepath thereof, and a stop pivoted adjacent said guide and having a toearranged to swing in said slot into the path of i the work. 7

In testimony whereof, I do afiix my signature;

JOHN J. NEILAN.

